From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Date: Thu, 27 Dec 2018 16:01:36 -0500 From: Sasha Levin Subject: Re: 4.19.5 and later has tons of false messages "BUG: non-zero pgtables_bytes on freeing mm: -16384" Message-ID: <20181227210136.GV86645@sasha-vm> References: <4e58571e-1991-4a70-7012-ff9dd76afee3@de.ibm.com> <1d6288dd-a65b-463a-8aeb-33904dafa9cc@de.ibm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Disposition: inline In-Reply-To: <1d6288dd-a65b-463a-8aeb-33904dafa9cc@de.ibm.com> Sender: linux-kernel-owner@vger.kernel.org List-Archive: List-Post: To: Christian Borntraeger Cc: Martin Schwidefsky , stable@vger.kernel.org, linux-s390 , linux-kernel@vger.kernel.org, Greg Kroah-Hartman List-ID: On Thu, Dec 27, 2018 at 10:28:56AM +0100, Christian Borntraeger wrote: > > >On 27.12.2018 10:13, Christian Borntraeger wrote: >> Martin, >> >> Right now you get a message >> "BUG: non-zero pgtables_bytes on freeing mm: -16384" >> for EVERY process that exits in 4.19.5 and later. >> >> bisect points to >> commit 4136161d676a93fc8df6bdb80d720c15522d6c24 >> Author: Martin Schwidefsky >> Date: Mon Oct 15 11:09:16 2018 +0200 >> >> s390/mm: fix mis-accounting of pgtable_bytes >> >> [ Upstream commit e12e4044aede97974f2222eb7f0ed726a5179a32 ] >> >> Turns out that this patch requires several dependencies so the autoselection of this >> patch was missing that. >> >> Can we either revert this patch or add the dependencies? >> >> Christian >> > >It seems that adding > >commit 6d212db11947ae5464e4717536ed9faf61c01e86 ("mm: add mm_pxd_folded checks to pgtable_bytes accounting functions") >fixes the issue. I've queued 6d212db11947 for 4.19 for now, thank you. -- Thanks, Sasha